ITX-n3700 CPU Scaling Fedora 24

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   I cannot get my ITX-N3700 to change frequencies in Fedora 24...Google has been little help.
I'm running "dd if=/dev/zero of=/dev/null" x 3 times

[root@sip ~]# cat /sys/devices/system/cpu/cpu?/cpufreq/cpuinfo_cur_freq 
479937
479937
480000
480000

[root@sip ~]# cat /sys/devices/system/cpu/cpu?/cpufreq/scaling_governor
performance
performance
performance
performance

[root@sip ~]# cat /sys/devices/system/cpu/cpu?/cpufreq/scaling_max_freq 
2400000
2400000
2400000
2400000

[root@sip ~]# uptime
 12:39:04 up 13:19,  2 users,  load average: 3.03, 3.01, 2.59

I'm booting UEFI.  I have tried both settings for SpeedStep (enabled / disabled).  I have the system running in "Sport" mode.

Where else to look?  Help is appreciated.

Edited by JustMeHere - 14 Aug 2016 at 1:22am

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JustMeHere Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 12 Jun 2016 Status: Offline Points: 13	Post Options Post Reply Quote JustMeHere Report Post Thanks(0) Quote Reply Topic: ITX-n3700 CPU Scaling Fedora 24 Posted: 14 Aug 2016 at 12:41am
	I cannot get my ITX-N3700 to change frequencies in Fedora 24...Google has been little help. I'm running "dd if=/dev/zero of=/dev/null" x 3 times [root@sip ~]# cat /sys/devices/system/cpu/cpu?/cpufreq/cpuinfo_cur_freq 479937 479937 480000 480000 [root@sip ~]# cat /sys/devices/system/cpu/cpu?/cpufreq/scaling_governor performance performance performance performance [root@sip ~]# cat /sys/devices/system/cpu/cpu?/cpufreq/scaling_max_freq 2400000 2400000 2400000 2400000 [root@sip ~]# uptime 12:39:04 up 13:19, 2 users, load average: 3.03, 3.01, 2.59 I'm booting UEFI. I have tried both settings for SpeedStep (enabled / disabled). I have the system running in "Sport" mode. Where else to look? Help is appreciated. Edited by JustMeHere - 14 Aug 2016 at 1:22am

JustMeHere Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 12 Jun 2016 Status: Offline Points: 13	Post Options Post Reply Quote JustMeHere Report Post Thanks(0) Quote Reply Posted: 14 Aug 2016 at 2:42am
	I've disabled intel_pstate and now I'm up at full CPU. I currently have speedstep turned off in UEFI. Once I can get to the machine, I will turn that back on and post further updates. There seems to be an issue with the intel_pstate and Fedora 24 with this Chipset maybe. Here's some info on p-state: https://www.kernel.org/doc/Documentation/cpu-freq/intel-pstate.txt I enabled tracing and could confirm that the cores would not scale up.

JustMeHere Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 12 Jun 2016 Status: Offline Points: 13	Post Options Post Reply Quote JustMeHere Report Post Thanks(0) Quote Reply Posted: 14 Aug 2016 at 5:35am
	Yep this is the fix. Now working as expected: [root@sip ~]# cpupower frequency-info analyzing CPU 0: driver: acpi-cpufreq CPUs which run at the same hardware frequency: 0 CPUs which need to have their frequency coordinated by software: 0 maximum transition latency: 10.0 us hardware limits: 480 MHz - 1.60 GHz available frequency steps: 1.60 GHz, 1.60 GHz, 1.52 GHz, 1.44 GHz, 1.36 GHz, 1.28 GHz, 1.20 GHz, 1.12 GHz, 1.04 GHz, 960 MHz, 880 MHz, 800 MHz, 720 MHz, 640 MHz, 560 MHz, 480 MHz available cpufreq governors: conservative userspace powersave ondemand performance current policy: frequency should be within 480 MHz and 1.60 GHz. The governor "ondemand" may decide which speed to use within this range. current CPU frequency: 480 MHz (asserted by call to hardware) boost state support: Supported: yes Active: yes [root@sip ~]# Running "dd if=/dev/zero of=/dev/null" As expected one core in at full speed: [root@sip ~]# cat /sys/devices/system/cpu/cpu?/cpufreq/cpuinfo_cur_freq 560000 480000 480000 1601000 [root@sip ~]# Now just to figure out turbo. Edited by JustMeHere - 15 Aug 2016 at 12:30am

JustMeHere Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 12 Jun 2016 Status: Offline Points: 13	Post Options Post Reply Quote JustMeHere Report Post Thanks(0) Quote Reply Posted: 15 Aug 2016 at 1:03am
	Hmmm, switched back to intel_pstate and cpu is scaling now.

parsec Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 04 May 2015 Location: USA Status: Offline Points: 4996	Post Options Post Reply Quote parsec Report Post Thanks(0) Quote Reply Posted: 15 Aug 2016 at 11:03am
	Thanks for this information, it may help someone, someday. Sorry, but most people use Windows, for reasons like the one you had. Plus they don't have the experience to know what to do. When using Linux, you are basically on your own, besides Linux forums. At least Intel provides a bit of support with drivers, or links to where drivers can be found.